
Water on Comet 67p Is like Nothing on Earth
Finding water on comet 67P/Churyumov-Gerasimenko comes as no surprise. Comets have been known to carry large patches of ice on them. What does come as a surprise, however, is the general makeup of this water. It is a finding that turns previously held beliefs on their head. The makeup of the water found on comet 67p is unlike anything found on Earth, containing about three times more deuterium, a heavy form of hydrogen. Why is this significant? For a long time scientists